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California Geological Survey

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  1. Earthquake Response Responsibilities and Functions California Geological Survey Jerry Treiman Senior Engineering Geologist California Geological Survey

  2. California Geological SurveyEarthquake Response 1. Provide information and support to CalEMA 2. Evaluate extent and severity of surface fault rupture 3. Evaluate extent and severity of ground failure 4. Collect Strong Motion Data 5. Monitor tsunami effects

  3. California Geological SurveyEarthquake Response • Establish Clearinghouse • identify hazards – document data • Facilitate overflights • Facilitate access • Collect and share data • Help coordinate field efforts • Disseminate critical information to responders and decision makers • [observe structural damage (with EERI)] • Clearinghouse does not direct or control activities 1994 Northridge Earthquake Clearinghouse

  4. California Geological SurveyEarthquake Response • 2. Map Fault Rupture for State APEFZ Program • Document breadth and complexity of faulting • Observe fault-related deformation • Assess adequacy of existing zones • Recommend zone revisions courtesy T. Rockwell courtesy T. Rockwell photo by K. Clahan

  5. California Geological SurveyEarthquake Response • 3. Identify Ground Failure • Landslides, liquefaction & lateral spread • Be alert to imminent threats to facilities and infrastructure • Learn from observed failures • Goal is to be able to make better hazard maps 2010 photo by H. Stenner 2010 2010 1994 photo by H. Stenner photo by T. McCrink photo courtesy P. Irvine

  6. California Geological SurveyEarthquake Response • 4. Strong Motion Instrumentation Program • Manages a network of accelerographs throughout the State (free field, hi-rise bldgs, dams, bridges) • Collaborates with CISN to produce Shake Map • Obtains records for buildings duringearthquake • Rapid dissemination of data through CESMD • Data to help improve codes and design

  7. California Geological SurveyEarthquake Response 5. Tsunami Response To evaluate adequacy of present maps and improve hazard assessment.

  8. California Geological SurveySouthern San Andreas Earthquake Response

  9. California Geological SurveySouthern San Andreas Earthquake Response Coordination USGS SCEC Others

  10. California Geological SurveySouthern San Andreas Earthquake Response • CGS goals – • Gather data with respect to the distribution • and magnitude of rupture and ground failure • Identify imminent hazards • Pass critical information to responders and • decision makers. • Maintain close contact with Clearinghouse and • other sites to ensure critical issues are covered

  11. California Geological SurveySouthern San Andreas Earthquake Response Needs that we are concerned about - • Overflights and other means to assess scope of event • Coordination of field efforts with others • Multiple field “camps” - one won’t be enough • Communication critical • Coordinate efforts for efficiency and completeness • Share information and timely observations • Coordinate info with SCEC response site and others

  12. California Geological SurveySouthern San Andreas Earthquake Response Lancaster San Bernardino Indio Credit: Rob Graves (URS) Brad Aagaard & Ned Field, (USGS); Nitin Gupta

  13. California Geological SurveyEarthquake Response • Outstanding Issues: • Pre-selection of field rendezvous sites to share • information and resources • Data communication and coordination • Staffing needs to get the work done • Aerial photography/remote imagery • Data collection standards/consistency • (forms; common datum) • Maps/GIS needs

  14. http://www.eqclearinghouse.org/CA/

  15. California Geological SurveyEarthquake Response

  16. Jerry Treiman Senior Engineering Geologist California Geological Survey